Press Esc to close
Sunday 24 September 2017
News updated at 9:19 PM IST

Burning crop residue exposes farmers to cancer-causing chemicals: Study

Kalyan Ray, New Delhi, June 27, 2013, DHNS : 4:30 IST
Burning crop residue exposes farmers to smoke containing cancer-causing chemicals which farmers and villagers ignorantly inhale as these chemicals stay in the air for a few days.

The practice, common in Indian farmlands, may pose a new health threat, say a group of Indian scientists who want the Central government to monitor the level of these chemicals in the air in post-harvest seasons in order to understand how serious and wide-ranging the perceived health threat is.

Three researchers from the Indian Institute of Science, Education and Research (IISER), Mohali, measured the level of these chemicals–known as benzenoids–in the air near Chandigarh in October and November, 2012, to compare the level of these chemicals before and after paddy crop residue was burnt.

Compared to October, there is 300 per cent increase in benzenoid level in November when dried stumps of paddy crops are put to flame. Similar “massive” presence of these chemicals are expected when wheat crop residues are burnt.

“Such high levels of benzenoids for 1-2 months in a year aggravates smog and can enhance cancer risks in northwestern India,” the researchers reported in the June 25 issue of Current Science.

“As a public health threat it is serious. The highest cancer risk from the carcinogenic chemicals released by paddy residue burning would be in the rural and agricultural areas where the burning actually takes place for 4-6 weeks in a year, as the exposure level would be highest there,” team leader Vinayak Sinha told Deccan Herald.

While busy traffic intersection in large cities like Delhi will have a high level of these chemicals, paddy residue burning may be a key contributor to high benzenoid levels in the countryside.

Prevailing weather conditions like wind flow will determine how long these chemicals will remain in the air and in what concentration. Dilution will reduce their harmful effects even though two chemicals–benzene (4.7 days) and toluene (1.6 days)–have a long life. Independent scientists, however, feel the linkage between higher levels of chemicals in the air and cancer risk is somewhat premature and more intense research is required.

“The data generated so far have been limited to two events. More data needed to define this correlation as a causality. The correlation between biomass burning and the health risk, such as increased incidence of cancer, is somewhat premature and requires more scientific validation,” commented S Sivaram, former director of National Chemical Laboratory, Pune, who was not associated with the study.

The IISER team cites the example of paddy growing Malwa region, which has high cancer prevalence. But they admit they are far from establishing a cause-and-effect relations in Malwa and more data was required.

“Exposure of the population to sustained high levels of carcinogenic benzenoids in the air they breathe for several months in a year could certainly be a contributory factor for cancer prevalence and warrants detailed multidisciplinary epidemiological and environmental studies,” the scientists said.

Go to Top

Photo Gallery
An artist decorate the idol Goddess Durga with a saree made of pure gold at a...

An artist decorate the idol Goddess Durga with a saree made of pure gold at a...

Artist perform ballet Swan Lake is the most beloved, classic and quintessential ballet...

Artist perform ballet Swan Lake is the most beloved, classic and quintessential ballet...

Children dressed as Lord Hanuman take part in a procession during Langur Mela at the...

Children dressed as Lord Hanuman take part in a procession during Langur Mela at the...

Bollywood actress Vaani Kapoor walks the ramp as showstopper at the...

Bollywood actress Vaani Kapoor walks the ramp as showstopper at the...

Bollywood actress Richa Chadda and Kalki Koechlin during the shooting of a song for their...

Bollywood actress Richa Chadda and Kalki Koechlin during the shooting of a song for their...

Women dance on the occasion of Lalita Panchami during Navratri celebrations at a pandal, in...

Women dance on the occasion of Lalita Panchami during Navratri celebrations at a pandal, in...

A pandal, themed on the Jagannath Temple of Odisha, in Ranchi on Sunday ahead of the...

A pandal, themed on the Jagannath Temple of Odisha, in Ranchi on Sunday ahead of the...

Union Minister for Defence, Nirmala Sitharaman and the Chief of Army Staff, General Bipin Rawat...

Union Minister for Defence, Nirmala Sitharaman and the Chief of Army Staff, General Bipin Rawat...

Tollywood actor Mahesh Babu with actress Rakul Preet Singh and director A.R. Murugadoss during a...

Tollywood actor Mahesh Babu with actress Rakul Preet Singh and director A.R. Murugadoss during a...

Armed forces during a multi agency exercise 'Pralay Sahayam' conducted at...

Armed forces during a multi agency exercise 'Pralay Sahayam' conducted at...

Like us on Facebook

Copyright 2017, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523
Powered by Yodasoft Technologies Pvt. Ltd.